Eligibility Question

So I went to UNLV in Las Vegas for one year and didn't play tennis, the following year I transferred to a d2 school to play, but a month into the semester they told me I was not eligible to play the whole year because I didn't have enough credits (need 24 I only had 18 because I took two remedial classes). So after this semester I plan on transferring back to vegas then the next fall to transfer somewhere else. If I don't take 12 credits the coming spring semester, would I be eligible to play somewhere else? Or do I have to stay at the d2 school to finish my one year residency to be eligible?